ACEO, Little Boy, a budding Musician, playing music with his toy xylophone and tambourine. Watercolor and Pen, Painting on 140 lb cold press paper, Original illustration art, not a print. Ref: Pixabay. 

ACEO refers to the size - 2½” x 3½” - also called an ATC or artist’s trading card. Signed. Complete contact info on back - comes in a protective sleeve.  The photo looks bigger, but it is truly the size of a baseball card.